CS215756B1 - Grey 1:2 chromium complex azo dyestuff - Google Patents

Abstract

1 »2 Chromium naphthol complex o, é-dlbydro: xyaiobarYlva, aaymetríeky nbstltuovaný one oulfookupl (vio formula), which controls the colorant dye for dyeing wool and polyamide by solonavi Gray shade, excellent excellent pull, egality and coloration.

Description

The present invention relates to a new 1: 2 amide-complex azo dye for coloring wine and polyamide.

For dyeing wool and polyamide, weakly acid to neutral baths are used, if they require the dyeing to have high dry and wet fastnesses, a 1: 2 melt-metal complex complex dye. They are coordination complexes of one metal atom and coordination number 6 (most often chromium or cobalt) with two standing or different ο, ό-dohydroxy-, ε-hydroxy-ω-carboxy or s-hydroxy-ω-amylnoazobarrides, Water solubility of these 1: 2 The metal complexes of the dyes - if they do not carry any lyophilic substituents - are very good and for practical application and the textile material from the aqueous medium must be converted into fine form by dispersion milling in advance.

Another set of its treatments for use in practical dyeing is to enhance solubility by appropriate substitution. 1: 2 are known to be metallo-complex dyes solubilized with non-halogenated, hydrophilic substituents, such as sulfamoyl or methanesulfonyl groups. However, these dyes are relatively expensive to produce. Consistent coloring qualities and even better results have been achieved in some cases with dyes selected from sulfo groups. The incorporation of sulfo groups into the 1: 2 molecule of the metal complex dye is not without problems. While the fully substituted 1: 2 complexes are basically salts of polyhydric acids, substitution with sulfo groups increases the negative charge of the color anion and, of course, can negatively affect its dyeing properties, namely dyeing as well as dyeing, but dyeing is influenced not only by electrical dyeing. substitution topography and spatial arrangement of the colored complex molecule,

It has now been discovered that wool and polyamide dye in greenish gray shades of gray 1: 2 the aromocomplox azo dye according to the invention, of the formula

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The dye according to the invention is characterized by a high solubility and dyeing strength. It has a very good degradation property, which exhibits excellent surface fastness to dyeing. It can be well combined with other dyes of the same or other metal complex complexes * or with conventional acid dyes.

Example 1

49 * 2 g (0.1 mol) of a staggering a1 azoazo dye complex o-nitr®-> 2- »affiaopheaol-4-sulfoacid> 2-naphthol paste is often added to an alkaline aqueous suspension of 0 * 1 mol monoaso dye 4- nitro-2-aainofanol -> 1,7-aeetaminonaphthol, heated to 80 ° C. After a few hours of heating to 80 to 85 ° C, a dark solution of a mixed 1: 2 truncated complex is formed. Evaporation gave 120 g of a strong dye, which stains wool and PAD in lower concentrations with a greenish gray in higher conoentra blacks. The prepared dye was stained with a slightly acid to neutral bath with a greenish-gray tint at 1 to 3 wt. and a black tint when applied at 3 to 6 wt.%, based on the weight of the dyed material.

Claims (1)

object of the invention Gray 1: 2 threats to the complex azo color pattern